Grand Rapids Technologies

Greg Toman founded Grand Rapids Technologies, Inc. in 1991 after seeing the need for an automated engine monitor with alarms that accurately measured exhaust gas and cylinder head temperatures for 2-stroke engines used in ultralight aircraft. Since then, the Engine Information System (EIS) has become the industry standard and instrumented over 25,000 engines, from small 2-stroke to turbines, all around the world.

In 2003, Greg partnered with long time friend and fellow pilot, Todd Stehouwer, to develop the Horizon Series 1 EFIS (Electronics Flight Instrument System), bringing modernization to experimental and light sport aircraft, including primary flight instruments, navigation and engine monitoring. Their new company was called GRT Avionics.

Grand Rapids Technologies, together with GRT Avionics, employs 8 full-time personnel. All GRT hardware is manufactured in Wyoming, Michigan, a small industrial suburb of Grand Rapids.